نتایج جستجو برای: pressurized fluid extraction

تعداد نتایج: 386894  

2015
Clara Grosso Patrícia Valentão Federico Ferreres Paula B. Andrade Alejandro M. Mayer

Marine ecosystems cover more than 70% of the globe's surface. These habitats are occupied by a great diversity of marine organisms that produce highly structural diverse metabolites as a defense mechanism. In the last decades, these metabolites have been extracted and isolated in order to test them in different bioassays and assess their potential to fight human diseases. Since traditional extr...

Journal: :Journal of agricultural and food chemistry 2013
Shekhar U Kadam Brijesh K Tiwari Colm P O'Donnell

Marine algae are a rich source of bioactive compounds. This paper outlines the main bioactive compounds in marine algae and recent advances in novel technologies for extracting them. Novel extraction technologies reviewed include enzyme-assisted extraction, microwave-assisted extraction, ultrasound-assisted extraction, supercritical fluid extraction, and pressurized liquid extraction. These tec...

2003
Judith R. Denery Klaus Dragull C. S. Tang Qing X. Li

Pressurized fluid extraction (PFE) was examined as an alternative technology for the extraction of carotenoids in the green algae Haematococcus pluvialis and Dunaliella salina and kavalactones in Piper methysticum. The extraction process was optimized by varying the key extraction factors of solvent, sample-solvent ratio, temperature, and time. The selectivity and efficiency of extraction param...

Journal: :Molecules 2009
Jing-Jing Xie Jia Lu Zheng-Ming Qian Yue Yu Jin-Ao Duan Shao-Ping Li

Coniferyl ferulate, which is noted for its multiple pharmacological activities and chemical instability, is abundant in Angelica sinensis. In this paper, five methods, namely sonication extraction (SE), pressurized liquid extraction (PLE), supercritical fluid extraction (SFE), hydrodistillation (HD) and decoction (DC) for extraction of coniferyl ferulate, as well as ferulic acid, Z/E-ligustilid...

Journal: :Molecules 2014
Antonietta Baiano

Food wastes are produced by a variety of sources, ranging from agricultural operations to household consumption. About 38% occurs during food processing. At present, the European Union legislation encourages the exploitation of co-products. This valorisation can be achieved through the extraction of high-value components such as proteins, polysaccharides, fibres, flavour compounds, and phytoche...

Journal: :Journal of chromatography. A 1997
S J Lehotay C H Lee

A fibrous cellulose powder (CF-1) was investigated as a drying agent for supercritical fluid extraction (SFE) and pressurized liquid extraction (PLE), also known as accelerated solvent extraction. Analysis of fifty-eight diverse pesticides was performed using gas chromatography-ion-trap mass spectrometric detection (GC-ITD). Extraction efficiencies were correlated versus pesticide polarity with...

Journal: :Molecules 2015
Mohammad B Hossain Ashish Rawson Ingrid Aguiló-Aguayo Nigel P Brunton Dilip K Rai

A higher yield of glycoalkaloids was recovered from potato peels using pressurized liquid extraction (1.92 mg/g dried potato peels) compared to conventional solid-liquid extraction (0.981 mg/g dried potato peels). Response surface methodology deduced the optimal temperature and extracting solvent (methanol) for the pressurized liquid extraction (PLE) of glycoalkaloids as 80 °C in 89% methanol. ...

Journal: :Molecules 2013
Lourdes Casas Cardoso Casimiro Mantell Serrano Edwin Torrez Quintero Clara Pereyra López Ruder Medrano Antezana Enrique J Martínez de la Ossa

In the work described here, two techniques for the recovery of anthocyanins from potato peel were studied and compared. One of the techniques employed was supercritical fluid extraction (SFE) with pure CO2 or with CO2 and ethanol as cosolvent and the other technique was pressurized liquid extraction (PLE), where the solvent used was ethanol in water acidified to pH 2.6. The effects of pressure ...

Journal: :Analytical chemistry 2002
Lisa J Fitzpatrick John R Dean

A method for the prediction of a suitable solvent for the extraction of pesticides is outlined. The procedure is based on the Hildebrand solubility parameter, delta(t). The solubility parameter is broken down into three individual components, which are calculated by the addition of group contributions. To demonstrate the applicability of the approach pressurized fluid extraction was used to ext...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه الزهراء - دانشکده علوم پایه 1390

چکیده تمام نما : یکی از پسماندهای پتروشیمی که آلوده کننده محیط زیست و سمی می باشد، پسماندهای حفاری آلوده به گل حفاری است .طیف وسیعی از تکنیک های استخراج آلودگی های نفتی ، از پسماندهای جامد وجود داردکه ازجمله می توان تکنیک های مرسوم مثل سوکسله، رفلاکس با متانولیک، آلتراسونیک تا تکنیک های مدرن مثل استخراج با روش سیال فوق بحرانی (super critical fluid extraction)حلال شتاب داده شده( accelerated solv...

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